In Case Of Difficulty - Honeywell RET97 Serie Manual De Instrucciones

About your new thermostat

In case of difficulty

If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank
No response to
Make sure heating and cooling temperatures are set to acceptable ranges:
key presses (or
temperature will
not change)
Note: Select models have temperature range setting limits that can limit the
ranges listed above. See Installation Instructions for more information.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA alkaline batteries
are correctly installed (see page 19).
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
RTH7400/RTH7500, RET97 Series
21 69-2744ES—03